I'm glad that you can self-identify that this prejudice is without merit. Everyone has different priorities and making broad sweeping assumptions about people would be pretty dumb.To some extent, yes, but there are certain ways of spending money that are obviously better than others, such as making sure that basic needs, such as food, shelter, and clothing, are provided for and met before spending money on luxuries and frivolous entertainment. I often picture the people who would spend money on these events as possible who have no clue how to manage their money, perhaps mostly because I cannot see the slightest value in this expenditure, and so I think of them as the kind of people who constantly buy the latest iPhone while living on food stamps. Is it true? Probably not. Is it fair for me to think of them like that? No, especially without any evidence, but it's the generalization I instinctively make in my head.
There is an argument to be made that these folks may have an entirely different set of values than others. There has been for a good ten years or so a philosophy of valuing experiences over things. Maybe these folks would rather fill their memories with unique adventures than fill a shelf with Funko Pops. Neither is definitively correct, but neither necessarily wrong as well.